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Introduction

This README v1.0 (June, 2005) for the v1.0 sentence polarity dataset comes
from the URL
http://www.cs.cornell.edu/people/pabo/movie-review-data .

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Citation Info 

This data was first used in Bo Pang and Lillian Lee,
``Seeing stars: Exploiting class relationships for sentiment categorization
with respect to rating scales.'', Proceedings of the ACL, 2005.
  
@InProceedings{Pang+Lee:05a,
  author =       {Bo Pang and Lillian Lee},
  title =        {Seeing stars: Exploiting class relationships for sentiment
                  categorization with respect to rating scales},
  booktitle =    {Proceedings of the ACL},
  year =         2005
}

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Data Format Summary 

- rt-polaritydata.tar.gz: contains this readme and two data files that
  were used in the experiments described in Pang/Lee ACL 2005.

  Specifically: 
  * rt-polarity.pos contains 5331 positive snippets
  * rt-polarity.neg contains 5331 negative snippets

  Each line in these two files corresponds to a single snippet (usually
  containing roughly one single sentence); all snippets are down-cased.  
  The snippets were labeled automatically, as described below (see 
  section "Label Decision").

  Note: The original source files from which the data in
  rt-polaritydata.tar.gz was derived can be found in the subjective
  part (Rotten Tomatoes pages) of subjectivity_html.tar.gz (released 
  with subjectivity dataset v1.0).

   
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Label Decision 

We assumed snippets (from Rotten Tomatoes webpages) for reviews marked with 
``fresh'' are positive, and those for reviews marked with ``rotten'' are
negative.
